refactor: remove legacy assistant compatibility

backend/tests/test_tool_organization_v4.py

@@ -58,7 +58,7 @@ class ToolOrganizationContractTests(unittest.TestCase):
         request = AssistantUpsert(**data)
         self.assertIsNotNone(request.built_in_tools.end_conversation)
 
-        response = AssistantOut(id="asst_legacy", **data)
+        response = AssistantOut(id="asst_realtime", **data)
         self.assertIsNotNone(response.built_in_tools.end_conversation)
 
     def test_workflow_camel_case_builtin_config_is_normalized_for_runtime(self):
@@ -247,6 +247,8 @@ class ToolBindingTests(unittest.IsolatedAsyncioTestCase):
             type="http",
             definition={
                 "config": {
+                    "allow_interruptions": True,
+                    "execution_mode": "immediate",
                     "parameters": [
                         {"name": "order_id", "type": "string", "required": True},
                         {"name": "tenant", "type": "string", "required": True},
@@ -280,6 +282,8 @@ class ToolBindingTests(unittest.IsolatedAsyncioTestCase):
             type="http",
             definition={
                 "config": {
+                    "allow_interruptions": True,
+                    "execution_mode": "immediate",
                     "parameters": [
                         {"name": "tenant", "type": "string", "required": True}
                     ]